Re: Tablespace OID, database OID, relfilenode

From: Wiwwo Staff <wiwwo(at)wiwwo(dot)com>
To: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
Cc: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: Re: Tablespace OID, database OID, relfilenode
Date: 2023-01-17 15:35:53
Message-ID: CAFe70G7qMpmasfNq4G3PgdEPubMkBJr34CZEPCPJ6eVF_sCtKg@mail.gmail.com
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Hi Laurenz,
thanks for your answer!
Ok, but I don't think "1663" is a sort of constant value for "base", isn't
it?

Let me clarify my question: how do I get, with a query, from "base" to 1663
(or whatever the value is)?

On Tue, Jan 17, 2023 at 4:01 PM Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
wrote:

> On Tue, 2023-01-17 at 15:48 +0100, Wiwwo Staff wrote:
> > Quick and to the point:
> >
> > If i execute
> > select pg_relation_filepath('pgbench_accounts');
> >
> > I get
> > pg_relation_filepath
> > ----------------------
> > base/5/16398
> >
> > where "base" is tablespace, but not tablespace OID, nor tablespace name.
> > How do I link it to get from "base" the tablespace OID?
> >
> > Or, in other words, given table pgbench_accounts, how do I get
> tablespace OID,
> > database OID and relfilenode so that I can use this info to filter
> output of pg_waldump?
>
> The tablespace OID is 1663, since "base" is the default tablespace
> "pg_default".
>
> Yours,
> Laurenz Albe
> --
> Cybertec | https://www.cybertec-postgresql.com
>

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